Array APB PLC's

[buuuudzik]

I know that other device(LM) should support multiregister function(ability to writing values to 2 address). But now I want only check connection and I have nothing.

Connection parameters should be:
Baudrate: 9600,
Data bits: 8,
Stop bits: 1,
Parity: None

I have on LM these parameters:
RTU-serial enabled: yes
Port: /dev/RS485-1,
Baudrate: 9600,
Parity: None(1 stop bit)
Half-duplex

I know that device has address 2.